Pt material, PtRh material or PtAu material hardened by oxide dispersion, produced by inner oxidation and having a high proportion of oxide and a good ductility

摘要

Dispersion-hardened platinum-containing materials comprise a noble metal component and a dispersion hardener. They contain 95 - 99% of a noble metal component. This consists of platinum or an alloy containing (wt%): Pt at least 55; Rh 0= 30; Au 0 - 15 and Pd 0 - 40. The remainder contains more than 1 wt% of a dispersion-hardener consisting of one or more metals oxidized to an extent of at least 90 wt% with oxygen. The metals are chosen from cerium, zirconium, scandium and yttrium. An independent claim is included for a method for producing dispersion-hardened platinum-containing materials from massive alloy castings containing less than 99% of noble metal and more than 1 wt% of dispersion hardener by oxidizing the metal in the dispersion hardener to an extent of at least 90%.